Improvement in cotton-presses



. slots.

Unire Sterns arena* trici-i1.

NATHAN CHAPMAN, OF MYSTIC RIVER, JONNECTICUT.

IMPROVEMENT IN COTTON-PRESSES.

.To all whom t may concern:

Be it known that I, NATHAN CHAPMAN, of Mystic River, in the county of New London and State of Connecticut, have invented a new and Improved Press for Pressing Cotton and other Articles to which it may be Applied; and I do hereby declare that the following is a full, clear, and exact description ofthe saine, reference being had to the annexed drawings, making a part of this specification, in which- Figure lis a longitudinal vertical section of my improved press, taken through the center, the working parts not being bisected. Fig. 2 is a face view ofv one ofthe toothed wheels, showing the projections thereon and the chain.

Similar letters of reference indicate corresponding parts inthe two figures.

Ihe nature of my invention consists in having the hubs of the toothed wheels on'which the chains which raise the follower work formed with recesses in them to receive the ends of the chains when wound up, and thereby cause said chains to exert a pressure inside of the bearings of said wheels, and retain the follower in `its elevated or raised position without any device being employed for that purpose. j

To enable others skilled in the art to make and use my invention, I will proceed to describe it.

A, Fig. l, represents a frame constructed in any proper manner to support the working parts of the press.

B is the press-box,constructed in the usual manner, its lower end being some distance below a platform, a, which is intended to repreV sent the sur/face of the ground, a hole being dug lin the earth to receive the lower end of i the pressboX.

C is the follower,.having arms b b-one at each end-which arms pass through slots c c in the side of the press-box. The arms are provided with friction-rollers d d, whichbear against side strips7 e c, at the edges of the (See dotted lines.)

D D are toothed wheels, the axes ff of which work in suitable bearings, gg, at the upper part of the frame A. On the inner sides of the toothed wheels D D are projections It, which extend from the hubs i of the toothed wheels to their peripheries in a spiral or coil form, as shown clearly in Fig. 2, each projection extending farther outward from the wheels as they approach the peripheries. (See Fig. l.) In the hubs t' t' of the wheels D D are recesses j j, which are cut in the hubs rather past their centers.

E E are chains, the upper ends ofwhich are secured to the inner sides of the wheels D D near their peripheries, and the lower ends are secured to rods k k, the lower ends of which are attached to the arms Z) b of the follower G. (See Fig. l.) rIhe links Z of the chains E E gradually decrease in length from the tops of 4 the chains downward, and correspond to the gradually-decreasing space between the projections 7L onl the toothed wheels D, (see Fig. 2,)A the spaces between said projections decreasing from the peripheries of the wheels toward the centers. The links l of the chains E E are riveted together so as to recede fromv the inner sides or faces of the wheels D D, and lit over the projections h, which, as before mentioned, gradually increasein breadth from the center' of the'wheels outward. The joints oi' the links fit over the projections and rest upon them, as shown in Fig. 2. rlhe toothed wheels D D are operated by pinions F F, one of which is shown in Fig. 2. are hung upon a horizontal shaft, G, connected by bevel-wheels H II to an upright shaft, I, to which the power is applied.-

J is a press-block Aat the upper end of the press-box I5. The chains E E fit over the projections h on the sides of the toothed wheels D D, when motion is communicated to the shaft I, and a progressive power of the follower C upon the material within the pressbox is obtained as the leverage is gradually in-` creased, owing to the spiral or coiled position of the projections upon the wheels, and when the chains are entirely wound up on the projections, the upper ends of the rods 7a lc pass into the recesses j j, and eXerta pressure inside of the bearings of the wheels D D, and retain the follower in its elevated or raised position without any device being employed for that purpose. The links Z, by resting upon the projections h, as shown, are prevented from beingbent. l

I do not claim thetoothed wheels D D, with These pinions proj ectons 7i thereon, separately, for they have I l; k when said chains are wound up on the pro been previously used neither do I claim opjeotions 7L on the wheels, in the manner and erating the follower by means of Chains, as for the purpose as herein shown and described. herein shownbut r T l T Vhat I do elaini as new, and desire to se- NA FHAB CHAPMAN eure by Letters Patent, is-

Vitn esses:

Forming the hubs i 'i of the Wheels D D BENJ. FISH, With recesses jj in them to receive the rods E. P. RANDALL. 

